package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import service.CommentService;
import util.JsonTools;

public class CommentServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public CommentServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		// 获得评论统计信息
		response.setContentType("text/html");

		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");

		PrintWriter out = response.getWriter();

		String goodsId = request.getParameter("goods_id");

		try {
			out.print(JsonTools.createJsonString(CommentService
					.getCommentCount(goodsId)));
		} catch (SQLException e) {
			e.printStackTrace();
		}
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		// 获得评论详情
		response.setContentType("text/html");

		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");

		PrintWriter out = response.getWriter();

		String action = request.getParameter("action");
		if ("get".equals(action)) {
			String goodsId = request.getParameter("goods_id");
			String start = request.getParameter("start");
			String count = request.getParameter("count");
			try {
				out.print(JsonTools.createJsonString(CommentService.getComment(
						goodsId, start, count)));
			} catch (SQLException e) {
				out.print("failed");
				e.printStackTrace();
			}
		}else if("add".equals(action)){
			String goodsId = request.getParameter("goodsId");
			String userName = request.getParameter("userName");
			String title = request.getParameter("title");
			String content = request.getParameter("content");
			String score = request.getParameter("score");
			try {
				out.print(CommentService.addComment(userName, goodsId, title, content, score));
			} catch (SQLException e) {
				out.print("failed");
				e.printStackTrace();
			}
		}

		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
